Gyro Values are increasing

VEX V5 General Discussion
1

I have been writing a lot of gyro code for my autons and I saw that none of my code was working. I tested the gyro by just having it print the value of the Gyro in a loop so I could see if it was a problem with the Gyro. I found that the gyro is just always decreasing its value towards -360, then rolling over to -1 and doing it again.

I don’t know why the Gyro is just randomly incrementing, and we have US Open very soon. Any help would be greatly appreciated.

2

Please show us your test code and verify you are giving it time to calibrate before moving.

And:
Gyroscope Filtering Discussion - #18 by Electrobotz
Another question, How do I properly use the Gyro sensor
https://renegaderobotics.org/getting-started-with-the-vex-gyro-sensor/
http://www.robotc.net/blog/2011/10/13/programming-the-vex-gyro-in-robotc/
PROS Gyro Integrator
Gyro Acting Weird (V5)

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3

Are you using V5 or Cortex?

If V5 see this post:

When we used Cortex, we did this “special” initialization:

pre_auton()
{
 // flash LED indicating Gyro calibration about to begin
 SensorType[in8] = sensorNone;
  wait1Msec(500); // Let user notice LED
  //Reconfigure Analog Port 8 as a Gyro sensor and allow time for ROBOTC to calibrate it
  SensorType[in8] = sensorGyro;
  wait1Msec(1350); // 1300 is just enough
  // Turn LED off
}

While Gyro is initializing your robot needs to remain stationary, so that gyro could calculate “null” drift.

References:
http://www.robotc.net/wikiarchive/VEX2_Sensors_Overview
http://help.robotc.net/Sandbox/Zendesk-Output/Content/Resources/topics/Getting_Started/Cortex/Competition_Templates.htm

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